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Bi-Layer p-n Junction Interconnections for Coal Based Solid Oxide Fuel Cells.

DE2005841139

Publication Date	2005
Personal Author	Gopalan, S.
Page Count	26
Abstract	In this report, a new approach for lower operating temperature solid oxide fuel cells (SOFCs) interconnections (IC) consisting of a bi-layer structure is proposed and analyzed. The bi-layer structure consists of a p-type layer exposed to cathodic gas (air/oxygen) and an n-type layer exposed to anodic gas (fuel). It is theoretically shown that the interfacial oxygen partial pressure which is an important design variable, is dependent primarily on the oxygen partial pressure gradient across the IC, the low level oxygen conductivities of the two layers and is largely independent of their electronic conductivities and the total current density through the IC material. Experimental difficulties in fabricating bi-layer structures are presently being addressed.
Keywords	Solid electrolyte fuel cells Coal Interconnections Density Oxygen Partial pressure Gradients Layers Solid oxide fuel cells
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Boston Univ., MA. Dept. of Mathematics.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
Title Note	Rept. for 10 Jul 03-31 Oct-04.
NTIS Issue Number	200606

Bi-Layer p-n Junction Interconnections for Coal Based Solid Oxide Fuel Cells.

Bi-Layer p-n Junction Interconnections for Coal Based Solid Oxide Fuel Cells.
DE2005841139

Publication Date	2005
Personal Author	Gopalan, S.
Page Count	26
Abstract	In this report, a new approach for lower operating temperature solid oxide fuel cells (SOFCs) interconnections (IC) consisting of a bi-layer structure is proposed and analyzed. The bi-layer structure consists of a p-type layer exposed to cathodic gas (air/oxygen) and an n-type layer exposed to anodic gas (fuel). It is theoretically shown that the interfacial oxygen partial pressure which is an important design variable, is dependent primarily on the oxygen partial pressure gradient across the IC, the low level oxygen conductivities of the two layers and is largely independent of their electronic conductivities and the total current density through the IC material. Experimental difficulties in fabricating bi-layer structures are presently being addressed.
Keywords	Solid electrolyte fuel cells Coal Interconnections Density Oxygen Partial pressure Gradients Layers Solid oxide fuel cells
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Boston Univ., MA. Dept. of Mathematics.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
Title Note	Rept. for 10 Jul 03-31 Oct-04.
NTIS Issue Number	200606